import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from "../components/Login";
import Home from "../components/Home"


Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home
  }
]

const router = new VueRouter({
  routes
})


//拿到路由对象，挂载路由导航守卫
router.beforeEach((to,from,next)=>{
  //to 将要访问的路径；
  //from 从哪个路径来的
  //next 函数，表示放行 next()放行；  next('/login')强制跳转
  if(to.path === '/login') return next();
  const tokenStr = window.sessionStorage.getItem('token');
  if(!tokenStr) return next('/login');
  return next();

})

export default router
